There are some reasons for this and why it is happening, the solar payment/bill increases incrementally each year until it ends, the company of the solar panels does not have great support, and the last thing, it is not a massive savings in eyes of the buyer with these burdens that they have to go through with an intense contract to sign too.   

Ideally you have a contract in place that spells out what happens if you split up or one of you dies?

If lenders would consider a 2-3% buyers agent commission as part of the purchase price and LTV based on this (contract price + buyers agent commission) we can end this Byzantine step of the buyer’s agent having a separate agreement executed with the seller for the seller to offer to cover the buyers agent commission.  

As Remington mentioned above, I would be cautious while wholesaling since so many wholesalers try to go around without disclosures and simple contracts.

How good is her contract? 

(I also suggest an in person visit to meet folks and get to know the areas, not to see a particular property but to build relationships.)Once you are active in a market you will start to connect with investors who may be selling, wholesalers who have assignable contracts, and your realtor may also have access to off market opportunities. 

Have you seen people who are weary of contingent contracts be willing to offer more in concessions at closing to help cover the bridge loan?  

The area is loaded with men on 1-2 year contracts who have homes some where else and they just need 1-2 years of safe, clean, comfortable housing and the only other option is seedy hotels.  

Of course, with all things, the answers to all these matters will depend on the circumstances.California tends to have more laws on the books and requirements and restrictions that it can be a good idea to form a CA LLC for out of state property so that you as a CA resident are covered, and to try to have your contracts fall under the purview of CA courts.

You can always sign a contract to buy the remaining properties anytime with a closing date scheduled for the future (not sure why he would want to do that though since we don't know what will happen appreciation-wise).